# A docker image suitable for cross-compiling Haiku applicationsThis docker image provides an environment suitable to build Haiku applicationsinside a Linux compiler. It can be used by projects willing to integrate anHaiku build inside their CI system, for example.The docker build of this image prepares the environment by:- Building our toolchain- Building the haiku hpkg files and downloading dependencies- Extracting headers and libraries from the hpkg files to generate a sysrootdirectory- Setting up environment variables for the toolchain to be usableYou can then use the $ARCH-unknown-haiku compiler (for examplearm-unknown-haiku-gcc) to build your application. All the required files areinstalled in /tools/cross-tools-$ARCH.## Building the imageThe Dockerfile accepts four arguments when building the image:* `BUILDTOOLS_REV` is the branch/tag of buildtools that should be built. It defaults to `master`.* `HAIKU_REV` is the branch/tag of the haiku repository that should be built. It defaults to `master`.* `ARCHITECTURE` is the primary architecture to build the tools and library for. It defaults to `x86_64`* `SECONDARY_ARCHITECTURE` is the secondary architecture. Leave it empty in case it is not necessary.For example, the r1beta4 images are build with the following commands:```bash# r1beta4 on x86 hybrid, with gcc2 as the primary architecture, and modern gcc as the secondarypodman build --build-arg BUILDTOOLS_REV=r1beta4 --build-arg HAIKU_REV=r1beta4 --build-arg ARCHITECTURE=x86_gcc2 --build-arg SECONDARY_ARCHITECTURE=x86 --tag docker.io/haiku/cross-compiler:x86_gcc2h-r1beta4 .# r1beta4 on x86_64podman build --build-arg BUILDTOOLS_REV=r1beta4 --build-arg HAIKU_REV=r1beta4 --build-arg ARCHITECTURE=x86_64 --tag docker.io/haiku/cross-compiler:x86_64-r1beta4 .```